Farm Equipment - Antifreeze

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Antifreeze

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=209929
Printed Date: 01 Feb 2026 at 4:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Antifreeze

Posted By: Acguywill
Subject: Antifreeze
Date Posted: 31 Jan 2026 at 11:36pm

This may be a dumb question but can antifreeze settle out? I have an old nat gas powered pumping unit that has been sitting in the barn for the last 4 years. Before I parked it I changed the oil and antifreeze and then ran it for a few, maybe 10, minutes. I pulled it out a couple weeks ago and the antifreeze in the rad was slushy close to solid actually. I opened the drain on the block and it was fine. Put it in the heated shop and let it thaw out and took a closer look at it today. Antifreeze from the top of the radiator tested good to -8 celsius and the first stuff out of the block was good to -40. I mixed it all back up and it tested good to -29 which is about what it would have been when I put it in. How is that possible?